EN
The article tackles the problem of sensitivity to threats that appear in cyber space in the security policies of selected international agents, including among others: the USA, Poland, Israel, Russia, the European Union and the North Atlantic Treaty. Cyber threats intensified with the development of information technology and the popularization of the Internet. Initially they were not very serious attacks done by self-taught programmers. Since mid-1990s the character of the hackers’ activity evolved with growing interest of individual countries in cyber space issues. Many countries, including the USA, Russia and China, began to focus on the development of their potential in this area in order to ensure maximum protection of their critical infrastructure against cyber attacks. In the 21st century the significance of cyber space for international security is constantly increasing. The promptness of response to new problems and the most appropriate path of development of the potential in this area will in the future determine not only the security but to some extent also the status of particular countries on the international arena.